Installing the drop-in Sonnax main pressure regulator valve kit 105740-12K eliminates the leakage of line pressure signal oil to exhaust with the incorporation of an extended front valve spool. This valve spool is 270% longer than the OE spool, so actuates in unworn areas of the bore. The O-ringed end plug provides a positive seal and prevents critical signal fluid from leaking to exhaust. Both of these Sonnax features ensure your units will have proper line pressure control through all drive ranges.

• Extended outboard spool is 270% longer than OE and actuates in unworn areas of the bore
• O-Ringed end plug provides positive seal to prevent critical signal fluid from leaking to exhaust
• Hardcoat anodized aluminum valve combats premature wear
• Drop-in Zip Valve^TM parts install quickly and easily